Ultrathin antimony oxide nanoribbon and its preparation method and application

Abstract

The present invention relates to the field of new energy industries, specifically to ultrathin antimony oxide nanoribbons, their preparation method, and applications. First, high-intensity point ultrasound is used to reduce the size of antimony powder particles to below 20 nm by controlling the ultrasound conditions. Second, a mild hydrothermal synthesis method is used to prepare aggregates of Sb2O3 nanoribbons by controlling the hydrothermal temperature. The final step includes exfoliation, separation and purification, and freeze-drying to obtain a powder material of ultrathin Sb2O3 nanoribbons. The Sb2O3 nanoribbons prepared by the present invention exhibit high quality, good dispersibility, high yield, and a high degree of oxidation, overcoming the technical drawbacks of prior art methods, such as relatively poor sample quality and low yield of Sb2O3 nanoribbons. The Sb2O3 nanoribbon-based sodium ion battery anode material prepared by the present invention exhibits excellent charge-discharge capacity, cycle stability, and rate performance.

Description

Technical Field

[0001] The present invention relates to the field of new energy industry, and specifically to an ultrathin antimony oxide nanobelt and a preparation method and application thereof, and uses the antimony oxide nanobelt as an anode material to prepare a high-efficiency sodium ion battery. Background Art

[0002] Unlike lithium-ion batteries, graphite's inert properties for sodium storage limit its sodium storage capacity, which severely restricts its application in sodium-ion batteries (SIBs) (Y. Wen, K. He, Y.Zhu, F. Han, Y. Xu, I. Matsuda, Y. Ishii, J. Cumings, C. Wang, Expandedgraphite as superior anode for sodium-ion batteries, Nature Communications ,2014, 5(4033). Therefore, it is crucial to explore suitable anode materials to promote the commercialization of SIBs. Among the various SIBs anode materials reported, antimony oxide (Sb2O3) has been widely used due to its relatively low cost, environmental friendliness, and ultra-high sodiumation rate (13.5 nm∙s −1 ) and over 1100 mAh∙g based on conversion alloy mechanisms −1Due to its inherent high theoretical capacity and other advantages, it stands out as a competitive candidate material (Y. Zheng, Z. Zhang, W. Liu, Y. Wu, X. Fu, L. Li, J. Su,Y. Gao, Investigations on the Electrochemical and Mechanical Properties of Sb2O3 Nanobelts by In Situ Transmission Electron Microscopy, Small Methods,2022, 6(3): e2101416; J. Fei, Y. Cui, J. Li, Z. Xu, J. Yang, R. Wang, Y.Cheng, J. Hang, A flexible Sb2O3 / carbon cloth composite as a free-standing high performance anode for sodium ion batteries, Chem. Commun., 2017, 53(98):13165-13167.). However, similar to other metal oxides, the poor rate capability and cyclability of Sb2O3 due to volume expansion during the salting / desalting process greatly limit the practical application of Sb2O3-based anode materials (MV Reddy, GV Subba Rao, BV Chowdari, Metal oxides and oxysalts as anode materials for Li ion batteries, Chem. Rev., 2013, 113(7): 5364-5457.).

[0003] Considering the anisotropic properties of crystalline anode materials, the volume changes observed during cycling also exhibit anisotropic behavior. Therefore, the design of low-dimensional crystalline materials is expected to be used to reduce the negative impact of volume expansion. For example, Lin et al. developed a double-zigzag Sb2O3 microbelt with a width of 800 nm, a thickness of 250 nm, and a length of several microns for use as anode materials for sodium-ion batteries (Z. Li, D. Fang, W. Zhang, J. Tian, ​​S. Chen, J. Liang , N. Lin,Y. Qian, Revealing Quasi-1D Volume Expansion in Na- / K-Ion Battery Anodes: ACase Study of Sb2O3 Microbelts, CCS Chem., 2020, 2:1306-1315. The results show that when the current density is 0.05 A∙g −1 The discharge capacity of these microstrips after 50 cycles was 470 mAh∙g −1. In addition, the Sb2O3 microbelts undergo significant volume expansion along the

[100] direction perpendicular to the ribbon plane. Based on this inspiration, minimizing the thickness of the microbelts can effectively reduce the crystal plane in the

[100] direction and increase the specific surface area of ​​the active material. This strategy has important application potential in further improving the cycling stability and charge-discharge capacity of Sb2O3. However, there are currently limited reports on the preparation of Sb2O3 nanobelts, and the commonly used methods can be roughly divided into two categories. One category includes chemical vapor deposition (N. Pradeep, V.Chaitra, V. Uma, AN Grace, Antimony oxide nanobelts: synthesis by chemicalvapour deposition and its characterisation, Int. J. Nanotechnol., 2017, 14(9-11): 752-761.). Sb2O3 nanobelts produced by this technology usually have high purity and excellent crystallinity, but they usually require temperatures exceeding 500 °C and have relatively low yields, making them unsuitable for large-scale applications. Other methods include hydrothermal methods using antimony salts or antimony powders as the main raw materials [L. Li, YX Zhang, XS Fang, TY Zhai, MYLiao, HQ Wang, GH Li, Y. Koide, Y. Bando, D. Golberg, Sb2O3 nanobeltnetworks for excellent visible-light-range photodetectors, Nanotechnology ,2011, 22(16): 165704; ZT Deng, D. Chen, FQ Tang, J. Ren, AJ Muscat,Synthesis and Purple-Blue Emission of Antimony Trioxide Single-CrystallineNanobelts with Elliptical Cross Section, Nano Res., 2009, 2(2): 151-160.] Among these methods, hydrothermal synthesis, which directly utilizes antimony powder as an antimony source, is simpler and more efficient. However, these methods often require large amounts of surfactants, such as polyvinylpyrrolidone (PVP), ethylenediamine (EDA), and cetyltrimethylammonium bromide (CTAB), which not only increases production costs but also has unpredictable effects on the inherent properties of the material. Therefore, achieving efficient preparation of ultrathin Sb2O3 nanobelts remains a major challenge. Summary of the Invention

[0004] The present invention overcomes the deficiencies of the prior art and provides a method for preparing ultrathin antimony oxide nanobelts. A simple and efficient hydrothermal method is used to prepare orthorhombic phase ultrathin Sb2O3 nanobelts. The notable feature of the present invention is that high-purity antimony powder is used as raw material, the entire synthesis process is carried out in deionized water under normal pressure, and no surfactant or other chemical reagents need to be added. The preparation method of the present invention is green and environmentally friendly, simple and easy to operate, and can greatly reduce the preparation cost. The prepared Sb2O3 nanobelts have the characteristics of high quality, ultrathinness, good dispersibility, high yield, and high degree of oxidation, so as to overcome the technical defects of the prior art methods such as relatively poor quality of Sb2O3 nanobelt samples, high cost of the preparation method, and environmental pollution.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a method for preparing ultrathin antimony oxide nanoribbons, comprising the following steps:

[0006] (1) Commercial high-purity antimony powder is placed in deionized water to prepare an antimony aqueous solution, and then the antimony aqueous solution is subjected to ultrasonic treatment in an ice bath to prepare an aqueous solution containing small-sized antimony particles or antimony quantum dots;

[0007] (2) diluting the aqueous solution containing small-sized antimony particles or antimony quantum dots in step (1) with deionized water, and then performing a hydrothermal synthesis reaction under normal pressure and vigorous stirring to obtain an aqueous solution containing Sb2O3 nanobelt aggregates;

[0008] (3) subjecting the aqueous solution containing the Sb2O3 nanobelt aggregates in step (2) to water bath ultrasonic peeling to obtain an aqueous solution containing ultrathin Sb2O3 nanobelts;

[0009] (4) The aqueous solution of the ultrathin Sb2O3 nanobelts in step (3) is separated and purified by a step-by-step centrifugation method, and then the separated and purified aqueous solution is freeze-dried to collect the powder material of the ultrathin Sb2O3 nanobelts.

[0010] As a further limitation of the technical solution of the present invention, in step (1), the mass volume ratio of the antimony powder aqueous solution is 0.5-1.5 g / L; the point ultrasonication step is: ultrasonication for 2-5 hours in an ice bath environment, the ultrasonic wave is output in the form of a pulse lasting 2 seconds every 4 seconds, and the ultrasonic power is 400-600 W, to obtain an aqueous solution containing antimony powder particles with a diameter of 3-20 nm.

[0011] As a further limitation of the technical solution of the present invention, it is characterized in that in step (1), the antimony powder is first ground with a ball mill, and after the grinding is completed, the antimony powder is dispersed in deionized water to obtain an aqueous solution containing small-sized antimony powder particles, and the grinding conditions are: using a zirconia grinding jar and ball milling balls, which are composed of grinding balls with a particle size of 5 mm and grinding balls with a particle size of 3 mm, and the ratio of the two is 1:1, the ball mill speed is 900-1100 rpm, and the grinding is 30-60 min.

[0012] As a further limitation of the technical solution of the present invention, the mass volume ratio of the diluted aqueous solution containing small-sized antimony particles or antimony quantum dots in step (2) is 0.25-0.75 g / L; the conditions of the hydrothermal synthesis reaction are: hydrothermal temperature 60-90 ° C, reaction time 1-3 h.

[0013] As a further limitation of the technical solution of the present invention, the conditions for water bath ultrasonic stripping are: the water bath temperature is room temperature, the ultrasonic power is 100-200 W, and the ultrasonic time is 1-3 h.

[0014] As a further limitation of the technical solution of the present invention, the operations of stepwise centrifugation and freeze-drying in step (4) are as follows:

[0015] S1. Centrifuge the aqueous solution containing ultrathin Sb2O3 nanobelts at 3000 rpm for 5 min and collect the supernatant I;

[0016] S2, centrifuging the supernatant I obtained in step S1 at 6000 rpm for 20 min to obtain precipitate I and supernatant II;

[0017] S3. Re-dispersing the precipitate I obtained in step S2 in deionized water, and freeze-drying the precipitate to obtain an ultrathin Sb2O3 nanobelt powder material.

[0018] The present invention also provides an ultrathin antimony oxide nanobelt obtained by the above preparation method.

[0019] As a further limitation of the technical solution of the present invention, the length of the Sb2O3 nanoribbon exceeds 10 μm, the width is 170-500 nm, and the thickness is 30-40 nm.

[0020] In addition, the present invention also provides the use of the ultrathin antimony oxide nanobelt in preparing anode materials for sodium ion batteries.

[0021] As a further limitation of the above application, the preparation method of the sodium ion battery anode material is as follows: ultrathin Sb2O3 nanobelt powder material, conductive carbon black (Super P) and carboxymethyl cellulose are mixed in a mass ratio of 7:2:1, and deionized water is added to prepare it into a slurry and coated on copper foil, and then the coated copper foil is dried in a vacuum oven at 80°C for 12 hours, and then cut into electrode sheets with a diameter of 12 mm.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention provides a novel and simple method for preparing ultrathin Sb2O3 nanoribbons, specifically: using high-purity antimony powder as raw material, ultrathin antimony oxide nanoribbons with a thickness of less than 40 nm are prepared by hydrothermal synthesis in deionized water without adding any surfactant or other chemical reagents;

[0024] The entire synthesis process can be roughly divided into three steps: first, high-intensity point ultrasound is used to reduce the antimony powder particle size to below 20 nm by controlling the ultrasound conditions. This process can also be achieved by ball milling. Second, a mild hydrothermal synthesis method is used to prepare Sb2O3 nanobelt aggregates by controlling the hydrothermal temperature. The final step includes exfoliation, separation and purification, and freeze-drying. Specifically, the aqueous solution containing the Sb2O3 nanobelt aggregates described in the second step is first subjected to water bath ultrasound exfoliation at room temperature to obtain an aqueous solution containing ultrathin Sb2O3 nanobelts. This is then purified by centrifugation to obtain an aqueous solution of Sb2O3 nanobelts of a specific size and thickness. The ultrathin Sb2O3 nanobelt powder is then collected through freeze-drying.

[0025] The present invention uses high-purity antimony powder as raw material and utilizes a simple hydrothermal synthesis method in pure water to prepare ultrathin Sb2O3 nanobelts. The preparation method of the present invention is green and environmentally friendly, simple and easy to operate, and can significantly reduce the preparation cost. The prepared Sb2O3 nanobelts have the characteristics of high quality, good dispersibility, high yield, and high degree of oxidation, thereby overcoming the technical defects of the existing technical methods such as relatively poor quality of Sb2O3 nanobelt samples and low yield.

[0026] 3. The Sb2O3 nanobelt-based sodium ion battery anode material prepared by the present invention exhibits good charge and discharge capacity, cycle stability and rate performance. Specifically: in a standard CR2032 button cell, the Sb2O3 nanobelt-based anode exhibits good charge and discharge capacity, cycle stability and rate performance at 0.1A·g −1 At this current, after 150 cycles, its discharge capacity still retained 443.1 mAh g −1; In addition, at 2.0 A∙g −1 Under the condition of −1 The average reversible rate capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram and actual picture of the process for preparing Sb2O3 nanobelts according to Example 1 of the present invention.

[0028] Figure 2 (a) Low-magnification TEM image and (b) high-resolution TEM image of the Sb quantum dot sample prepared in step (1) of Example 1 of the present invention.

[0029] Figure 3 (a) low-magnification SEM image and (b) high-resolution SEM image of the ultrathin Sb2O3 nanobelt sample prepared in step (4) of Example 1 of the present invention.

[0030] Figure 4 (a) AFM image and corresponding (b) height image of the ultrathin Sb2O3 nanobelt sample prepared in step (4) of Example 1 of the present invention.

[0031] Figure 5 (a) XRD pattern and (b) Raman pattern of the ultrathin Sb2O3 nanobelt sample prepared in step (4) of Example 1 of the present invention.

[0032] Figure 6 (a) Low-magnification TEM image and (b) high-resolution TEM image of the ultrathin Sb2O3 nanobelt sample prepared in step (4) of Example 1 of the present invention.

[0033] Figure 7 (a) Cycling performance and (b) rate performance of the ultrathin Sb2O3 nanobelt-based anode prepared in step (5) of Example 1 of the present invention. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to specific embodiments. Example 1

[0035] like Figure 1 As shown, a method for preparing ultrathin antimony oxide nanoribbons in pure water as a high-efficiency anode for sodium ion batteries comprises the following steps:

[0036] (1) Take an appropriate amount of commercial high-purity antimony powder and place it in deionized water to prepare an antimony aqueous solution with a solubility of 1 g / L; then perform point ultrasonic treatment on the antimony aqueous solution. The specific steps are: ultrasonicate for 3 h in an ice bath environment, with the ultrasonic wave output in the form of a pulse lasting 2 seconds every 4 seconds and an ultrasonic power of 500 W, to obtain an aqueous solution containing antimony quantum dots with a diameter of about 5 nm, such as Figure 2 As shown;

[0037] (2) The aqueous solution containing antimony quantum dots of about 5 nm in size prepared in step (1) was diluted with deionized water to 0.5 g / L; and then a hydrothermal synthesis reaction was carried out under normal pressure and vigorous stirring. The specific steps were as follows: the hydrothermal temperature was 80 °C and the reaction time was 2 h, to obtain an aqueous solution containing Sb2O3 nanobelt aggregates;

[0038] (3) subjecting the aqueous solution containing the Sb2O3 nanobelt aggregates in step (2) to water bath ultrasonic stripping, wherein the specific operation is as follows: the water bath temperature is room temperature, the ultrasonic power is 200 W, and the ultrasonic time is 2 h to obtain an aqueous solution containing ultrathin Sb2O3 nanobelts;

[0039] (4) The aqueous solution of Sb2O3 nanobelts in step (3) is separated and purified by a stepwise centrifugation and freeze-drying method and the sample is collected. The specific operation is as follows:

[0040] S1. Centrifuge the aqueous solution containing Sb2O3 nanobelts at 3000 rpm for 5 min and collect the supernatant I;

[0041] S2, centrifuging the supernatant I obtained in step S1 at 6000 rpm for 20 min to obtain precipitate I and supernatant II;

[0042] S3. Re-dispersing the precipitate I obtained in step S2 in deionized water, and freeze-drying the precipitate to obtain powdered ultra-thin Sb2O3 nanobelts.

[0043] (5) The powder material of the ultrathin Sb2O3 nanobelt in step (4) was used as the anode material of the sodium ion battery, and the sodium storage performance of the Sb2O3 nanobelt-based anode was tested in a standard CR2032 button battery. The specific operation was as follows: the powdered ultrathin Sb2O3 nanobelt, conductive carbon black (Super P) and carboxymethyl cellulose in step (4) were mixed in a mass ratio of 7:2:1, and an appropriate amount of deionized water was added to prepare a slurry to be coated on a copper foil. The coated copper foil was then dried in a vacuum oven at 80 °C for 12 h, and then cut into electrode sheets with a diameter of 12 mm. These electrode sheets were then used to assemble CR2032 button batteries, and their sodium storage performance was characterized. The cycle performance and rate performance of the Sb2O3 nanobelt-based anode are shown in Figure 2. Figure 7 As shown, specifically: Sb2O3 nanobelt-based anode at 0.1 A·g −1 At this current, after 150 cycles, its discharge capacity still retained 443.1 mAh g −1 ; In addition, at 2.0 A∙g −1 Under the condition of−1 The average reversible rate capacity. Example 2

[0044] The difference between this example and Example 1 is that the initial solubility of the antimony powder aqueous solution in step (1) is 1.5 g / L. The remaining steps and parameters are the same as those in Example 1. Example 3

[0045] The difference between this example and Example 1 is that the ultrasonic power in step (1) is 600 W and the ultrasonic time is 2 h. The remaining steps and parameters are the same as those in Example 1. Example 4

[0046] The difference between this example and Example 1 is that the hydrothermal temperature in step (2) is 90°C and the reaction time is 1 h. The remaining steps and parameters are the same as those in Example 1. Example 5

[0047] The difference between this example and Example 1 is that the hydrothermal temperature in step (2) is 60°C and the reaction time is 3 h. The remaining steps and parameters are the same as those in Example 1. Example 6

[0048] The difference between this example and Example 1 is that the ultrasonic power of the water bath ultrasonic stripping in step (3) is 100 W and the ultrasonic time is 3 h. The remaining steps and parameters are the same as those in Example 1. Example 7

[0049] The difference between this example and Example 1 is that step (1) is completed by ball milling. The remaining steps and parameters are the same as those in Example 1.

[0050] Ball milling steps: Use zirconia grinding jars and ball milling balls, consisting of grinding balls with a particle size of 5 mm and grinding balls with a particle size of 3 mm, and the number ratio of the two is 1:1. The ball mill speed is 1100 rpm and the grinding is carried out for 30 minutes. After grinding, it is dispersed in deionized water to obtain an aqueous solution containing small-sized antimony powder particles. The mass volume ratio of the aqueous solution is 0.5 g / L. Example 8

[0051] The difference between this example and Example 1 is that step (1) is completed by ball milling. The remaining steps and parameters are the same as those in Example 1.

[0052] Ball milling steps: Use zirconia grinding jars and ball milling balls, consisting of grinding balls with a particle size of 5 mm and grinding balls with a particle size of 3 mm, and the number ratio of the two is 1:1. The ball mill speed is 900 rpm and the grinding is carried out for 60 minutes. After grinding, it is dispersed in deionized water to obtain an aqueous solution containing small-sized antimony powder particles. The mass volume ratio of the aqueous solution is 0.5 g / L.

[0053] Well-defined ultrathin Sb2O3 nanoribbons were successfully prepared in pure deionized water. Figure 2 (a) and (b) SEM characterization of the samples after completing step (1). The results show that the size of the antimony powder is reduced to the size of quantum dots after point ultrasonic treatment.

[0054] Figure 3 This is the SEM of the ultrathin Sb2O3 nanobelt sample from step (4). The results show that the length of the Sb2O3 nanobelt exceeds 10 μm and the width is between 170-480 nm.

[0055] like Figure 4 As shown in Figure 2, the thickness of the ultrathin Sb2O3 nanoribbon samples obtained in step (4) was analyzed by AFM. The results showed that the thicknesses of the nanoribbons with widths of 323.2 nm and 336.7 nm were 34.1 nm and 38.4 nm, respectively.

[0056] like Figure 5 As shown in Figure 2, the crystal structure of the ultrathin Sb2O3 nanobelt sample in step (4) was further analyzed by XRD and Raman spectroscopy. The results showed that the crystal structure of the Sb2O3 nanobelt sample at this time was mainly orthorhombic Sb2O3.

[0057] Figure 6 The TEM image of the ultrathin Sb2O3 nanobelt sample in step (4) shows that the Sb2O3 nanobelt sample exhibits a good nanobelt structure and has a (002) crystal plane belonging to the orthorhombic Sb2O3, further confirming that Figure 5 results.

[0058] like Figure 7 As shown in Figure 2, the sodium storage performance of the ultra-thin Sb2O3 nanobelt sample in step (4) was tested in a standard CR2032 button cell. The results show that the Sb2O3 nanobelt-based sodium ion battery anode material prepared by the present invention exhibits good charge and discharge capacity, cycle stability and rate performance. Specifically: The Sb2O3 nanobelt-based anode is 0.1 A·g −1 At this current, after 150 cycles, its discharge capacity still retained 443.1 mAh g −1 ; In addition, at 2.0 A∙g −1 Under the condition of −1 The average reversible rate capacity.

[0059] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for preparing ultrathin antimony oxide nanoribbons, characterized in that: The following steps are involved: (1) Antimony powder is placed in deionized water to prepare an antimony aqueous solution, and then the antimony aqueous solution is subjected to ultrasonic treatment in an ice bath to prepare an aqueous solution containing small-sized antimony particles; or the antimony powder is ground in a ball mill, and after the grinding is completed, the antimony powder is dispersed in deionized water to prepare an aqueous solution containing small-sized antimony particles; The point ultrasonication step is as follows: ultrasonicating for 2-5 hours in an ice bath environment, with ultrasonic waves output in the form of pulses lasting 2 seconds every 4 seconds and an ultrasonic power of 400-600 W, to produce an aqueous solution containing antimony powder particles with a diameter of 3-20 nm; The grinding conditions are as follows: using a zirconia grinding jar and ball milling balls, consisting of grinding balls with a particle size of 5 mm and grinding balls with a particle size of 3 mm, with the ratio of the two being 1:1, the ball mill speed being 900-1100 rpm, and grinding for 30-60 min; (2) diluting the aqueous solution containing small-sized antimony particles in step (1) with deionized water, wherein the mass volume ratio of the diluted aqueous solution containing small-sized antimony particles is 0.25-0.75 g / L; then performing a hydrothermal synthesis reaction under normal pressure and vigorous stirring, wherein the conditions of the hydrothermal synthesis reaction are: hydrothermal temperature of 60-90°C and reaction time of 1-3 h, to obtain an aqueous solution containing Sb2O3 nanobelt aggregates; (3) subjecting the aqueous solution containing the Sb2O3 nanobelt aggregates in step (2) to water bath ultrasonic peeling to obtain an aqueous solution containing ultrathin Sb2O3 nanobelts; (4) The aqueous solution of the ultrathin Sb2O3 nanobelts in step (3) is separated and purified by a step-by-step centrifugation method, and then the separated and purified aqueous solution is freeze-dried to collect the powder material of the ultrathin Sb2O3 nanobelts, wherein the thickness of the ultrathin Sb2O3 nanobelts is 30-40 nm.

2. The method for preparing an ultrathin antimony oxide nanoribbon according to claim 1, wherein: The mass volume ratio of the aqueous solution of antimony powder in step (1) is 0.5-1.5 g / L.

3. The method for preparing an ultrathin antimony oxide nanoribbon according to claim 1, wherein: The conditions for water bath ultrasonic stripping are: water bath temperature is room temperature, ultrasonic power is 100-200 W, and ultrasonic time is 1-3 h.

4. The method for preparing an ultrathin antimony oxide nanoribbon according to claim 1, wherein: The operation of stepwise centrifugation and freeze drying in step (4) is as follows: S1. Centrifuge the aqueous solution containing ultrathin Sb2O3 nanobelts at 3000 rpm for 5 min and collect the supernatant I; S2, centrifuging the supernatant I obtained in step S1 at 6000 rpm for 20 min to obtain precipitate I and supernatant II; S3. Re-dispersing the precipitate I obtained in step S2 in deionized water, and freeze-drying the precipitate to obtain an ultrathin Sb2O3 nanobelt powder material.

5. An ultrathin antimony oxide nanoribbon obtained by the preparation method according to any one of claims 1 to 4.

6. The ultrathin antimony oxide nanoribbon according to claim 5, characterized in that: The length of the Sb2O3 nanoribbons exceeded 10 μm and the width was 170-500 nm.

7. Use of the ultrathin antimony oxide nanoribbon according to claim 6 in preparing anode materials for sodium ion batteries.

8. The use according to claim 7, characterized in that The preparation method of the sodium ion battery anode material is as follows: ultra-thin Sb2O3 nanobelt powder material, conductive carbon black and carboxymethyl cellulose are mixed in a mass ratio of 7:2:1, and deionized water is added to prepare a slurry, which is then coated on copper foil. The coated copper foil is then dried in a vacuum oven at 80°C for 12 hours and then cut into electrode sheets with a diameter of 12 mm.

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